Siemens SIMATIC Distributed I/O System DP/ASi Link, Руководство пользователя

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Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
4.4.7 Wiring of PROFIBUS-DP
This section describes the points you have to take into account when you
wish to prepare the bus cables yourself.
We can provide you with ready cut and terminated cables for the bus connec-
tion and the power supply (refer to section 4.4.3).
For the bus connection and connection of the power supply, you require
12-pin circular connectors.
Table 4-8 shows the Order Number for the 12-pin circular connector:
Table 4-8 Order Number for circular connector
Circular Connector Order Number
12-pin connector with pin insert
(unprepared) 6ES5 760-2CB11
The following applies to all connections to circular connectors:
Strip sufficient insulation from the cable so that the screen is firmly en-
closed by the clamping ring in the circular connector.
Always use the same color of the cores for the same signal; the following
applies to the green/red PROFIBUS cable:
– always connect terminal A to the green wire
– connect terminal B to the red wire
Use only a 3-core cable for the power supply.
!
Caution
If you use a 5-core cable for the power supply, the PROFIBUS-DP can no
longer operate.
Since the two DP connections on the DP/ASi link are connected internally, a
5-core power supply cable represents a prohibited spur line.
Introduction
Circular
connectors
Rules: circular
connectors
Power supply
cable
Installing and Wiring the DP/ASi Link